Yes it is, His name is Discord, and the reason behind that is in the DESC. -T

Description: Discord. T's Shadow. Representation: The Four Horns: The Four Demons, The Cross over the T: The Fear of not living up to his name. The Muzzle: The Thought process of not being able to express his issues with life. The "Neck Decoration": We all know what this is and what it represents. The Second "T": The blood spilled on the battlefield. The Slashes on his chest: Represents the abusive relationship he found himself in, as well as his abusive parents. The Imperfect stance/ Imbalanced Pixels: Represents that T wants to be perfect but knows he never will. The Dark Color: Shows that deep down he's a bad guy. The Name (Discord): Shows that he brings Chaos to the world, wherever he goes, Chaos Follows.